You must include the apache base class before using any apache defined resources

include apache class before trying to manipulate any of its modules.

--HG--
branch : apache-before-module
make webroot configurable

by default most distros place their www content in /var/www
cobbler's Makefile however assumes for Debian/Ubuntu /srv/www
For those poor souls (me) who have to build their own packages,
lets make the www root configurable, so they suffer less.

--HG--
branch : configure-var-www
Merged in igalic/puppet-cobbler/apache-before-module (pull request #2)
added scope fixes for apache module, closes #9
Close branch configure-var-www

--HG--
branch : configure-var-www
extra : close : True
Merged in igalic/puppet-cobbler/configure-var-www (pull request #3)
merge with configure-var-www
Renaming of 'default_webroot' param to 'webroot'.